Seasons where 8 or more defensemen had 70 or more points in a season:
2022-23 (8)
1993-94 (8)
1992-93 (9)
That is all...this is a real outlier year for the sheer number of defensemen who put up big numbers.
Seasons where the top scoring defenseman beat the runner up by >25 points:
2022-23: Karlsson 101, Morrissey/Hughes 76 (25 point gap)
1985-86: Coffey 138, Mark Howe 82 (56 point gap!)
1984-85: Coffey 121, Bourque 86 (35)
1983-84: Coffee 126, Bourque 96 (30)
1978-79: Dennis Potvin 101, Salming 73 (28)
1975-76: Dennis Potvin 98, Jean Potvin 72 (26)
1974-75: Orr 135, Dennis Potvin 76 (59)
1973-74: Orr 122, Park 82 (40)
1972-73: Orr 101, Lapointe 54 (47)
1971-72: Orr 117, Park 73 (44)
1970-71: Orr 139, Tremblay 63 (76!)
1969-70: Orr 120, Vadnais 44 (76!)
1960-61: Red Kelly 70, Doug Harvey 39 (31)
So if you're ever wondering how dominant Orr was...in 1969-70 and 1970-71, you could have divided Orr's points by 2 and he'd still have placed 1st and 2nd in defenseman scoring for those seasons!
Orr was 26 at the start of the 1974-75 - the year he beat Potvin by 59 points. He'd only play 30 more NHL games after that...